/ˈleksɪkən ||; ˈlɛksɪkən/noun1 alsothe lexicon [sing] all the words and phrases used in a particular language or subject; all the words and phrases used and known by a particular person or group of people （某语言或学科使用的、某人或某群人掌握的）词汇
2 [C] a list of words from A to Z on a particular subject or in a language 词典；专科词典: a lexicon of technical scientific terms 科技术语词典